Advertising device



E. F'. TREVAIL.

ADVERTISING DEVICE.

APPLICATION FILED JUNE 12, 1919.

1,355,716. Patented 0ct.'12,1920.

UNITED STATES.

EDWIN FLEMING TnEvAIL, on JOHANNESBURG, TnansvAAL, OUTH RICA.

ADVERTISING nnvrcn; I

Toallwhomz'tmayconceiati i Be it known that I, EDWIN F LEMINGI T m VAIL, a British subject, residing at 25:7th-- 'avenue, Bezuidenhout Valley, Johannesburg, Transvaal Province of the. Union of South Africa, have invented certain. new

' ture and useful Improvements in Advertising Devices, of which the following is a specification.

The present invention has reference to apparatus for exhibiting pictures andparticularly to apparatus such as is employed for advertising, in which the exhibited picis eriodically and automatically changed'm, he'ternipicture is used in this specification in a wide sense as including pictorial matter, letter pressand the like.

The apparatus forming the subject of this application presents a picture for a period, causes it to fade out -usually by progressive and gradual blurring. and without substantial variationof the illumination,and

. then again brings a picture (usually the next of a series) into view in the reverse manner. The apparatus is simple and compact and may thus be attachedfor exhibition to the external wall of a building. It enables a picture series of indefinite length to be shown and permits the number. or sequence of the series readily to be altered.

In the accompanying drawings Figure I is a sectional elevation of theplane II, Fig. IV. I

Fig. II is a sectional elevation of the plane II-II, Fig. IV.. L f Fig. III is a sectional elevation of the plane III-JII, Fig. IV. I

Fig. IV is a plan sectioned on 1IV IV Fig. I.

Fig. V shows the picture sheets.

1 indicates a frame which may besecured in front of an opening 2 in the wall 8 of a building. 4 is'a boX of which the frame 1. forms the front and which incloses the mechanism and the pictures The box is provided with doors such as 5, for giving access to theint'erior- Said box is d'etachably secured to the frame by fastenings 6 and is fitted with casters 7 so that it can readily be withdrawn. from and re-secured to the framel when desired.

In the frame 1 is mounted a translucent window 8 which may be coarsely ground glass or glass coveredwith thin paper. 9 is I a transparent picture llluminated from be Specification of Lettersfatent I Patented 0613, 12, 1920.

Application filed June 12, 1919. Serial Iva-303,579.

hind by merit. [The pictures exhibited 1 by pressing 'it against the translucent windovv 8, when, provided. the interior illumination is greateri than,-the exterior. illuminatiom the picture is=clearly visible. Upon now withdrawing the picture slow-1y fronithe windowit is seen to become blurred and finally all-definition is lost,- the Window showing simply an illuminated blank. Upon reversing theprocess and gradually moving a picture up. to the window until it is finally pressedagainstthe same, the picture graduallyftakes form and comes into focus very similarly to'the focusing of a picture" by means of a' lens. In showing a series ofpictures the change of picture is made while the picture is retracted from the window, when it is, forall practical purposes invisible' The pictures are conveniently; cotton sheets painted with transparent colors. Ads jacent sheets are secured to a common slat 11, Fig. V, byhemming and indenting-the ends 12 as'shown and passing. theslatll through the, hems. keeps the slatnin place. In this way an endless picture band of ,indefi nite" length is formed, suchasto permit .part of it to be readily altered by the insertion, with-; drawal, and substitution of one or more pic ture. sheets 9. i I

14 is a carriagev over which the picture band is looped and which ismounted to slide in guides 15 for movement towardand from the window 8. 'It is provided at the front with a glassor similar sheet 16, in front of 'which the picture'for exhibition is posi- 8 may be supported, by a rubbercushion 17 For reciprocating the carriage :there is provided a crank 18Ijournaled in the box 4 V i r and rotated in thedirection of the arrow by 160 i any suitable means such asthe motor 19. The crankrotates slowly, say twice each minute.L O it is a crankpin 20 which, during part of the revolution of the crank, cooperates with a cam surface 21, 22, 23, 24., 25 formed in the carriage 14. The shape of V the latter is such that the pin 20 first en-' gages the part 21 and withdraws the can *riage 14: from the window 8 slowly in order to-avoid too rapid disappearance of the pic A pin 13 at each end 80 which throw light onto the front of the ture. Thereafter the pin 'engages the cam part 22 whereby the'carriage is fully Withdrawn at faster rate. vWhen the carriage is fullywithdrawn it is so held by making the part 23' of the cam surface an arc of the circle traversed by the pin 20;

and during this period of the earn the pic ture is changed, The;pin thereafter engages the cam parts 24: and 25 which are the reverse of parts 22 and-Qlrespectively, so. that the new picture is carried. up to the window 8 with'am'otion which'isat first rapid and then slows up to cause the picture to come into definition'with'agreeable gradualness. The. picture remains in view while the crankis moving from the cam part 25 back to the cam part 2 1."

For; the purpose of changing the'picture' a traveler 27 is mounted to slide vertically at the back of the box 43in guides 28. Forwardly from the traveler project the two V fingers 29 and upon the traveler being pulled of its travel, the saidfingers engageone of the slats 11, and carry it down the length frame.

down whilethe carriage 14. is at the back ofone picture, so'pulling the next picture up into place in front of the glass 16. In order to make the carriage 14: short from front to back in relation to the height of the picture, the picture band is "doubled over idler rollers 30 at the top of the carriage into the bottom of the box 4;, as indicated at 9, so that any length of band can be accommodated.

For reciprocating the traveler 27 an arm 31 pivoted to the box 4 at 32 is rocked back and forth by a second crank 83, the 'pin 34 of which engageslugs 35 on the arm 31.

Said arm carries a toothed segment '36 gear ing. with a pinion 37 fast with a drum 88, 1 A cord 39 is wound on the drum and its two ends are carried by guide rollers 40 to opposite sides of the traveler I27 The pin 34 drives the arm. 31 rearward during the period that thecarriage -14 is retracted and a stationary; and it drives, the arm forward 5 front of the picture during 1ts changing at any convenient time while the pictureis showing. Movement of the carriage 14 to its forward position withdraws the slats 11 clear of the fingers 30, so enabling the latter to be raised without moving the slats."

It is sometimes desirable, in. order to mask strong colors in a picture'while the same is being changed, to. illuminate the movement. For this purpose there are provided lamps 26'which are shut off from the picture by the carriage 14; when the latter is at the forward point of its travel, "but The slack of the band folds down.

picture when the same is "sufficiently withdrawn. I P

I claim:

1. In a picture exhibiting apparatus, a

translucent window, a picture carrier movable; toward and from the window to press a picture against the window, .and means whereby adifferent picture will be pressed against the window at each forward movement of the carrier.

2. In picture exhibiting apparatus, a translucent window a picture band comrisin a succession of ictu'res means-to 'press a picture in contact with the window andf to withdraw the same and meansto feed thepicture band when so withdrawn;

In picture exhibiting apparatus, a translucent wlndow, a picture, means to advance said picture to the window for exhi-' bition and to wlthdraw the same, said means causing the final advancing movement and initial "withdrawing movement to be slow "in relation to the rest of the movement.

4. In picture. exhibiting apparatus, a

translucent window, a carriage reciprocable to and fromthe window, a transparent front to said carriage, a picture "movably mounted between sald window and said transparent front, and means to reciprocate the carriage to press the pictureon the transparent front.

. 5. In picture exhibiting. apparatus, transparent window, a carriage 'reclprocable to and from the same, a picture band on the carriage a traveler positioned for engage- Inent withthe picture band when the carriage is retracted from the winclowand means to reciprocate the traveler synchronously with the reciprocation "of the car;

ing a transparent member at its. front,

meanson the carriage for'supporting a picture band to permit it to pass in rear of the window, means for' reciprocating the car:

riage, and means, whereby the picture band may be moved between the window and transparent member.

In testimony whereof I affix my signature. r

" EDWIN FLnMrNe TREVAI'L. V 

